TY - JOUR

T1 - Solid-State Hydrogen-Generating Composites Based on Sodium Borohydride

T2 - Effect of the Heat Treatment of Boron–Cobalt Catalysts on the Hydrogen Generation Rate

AU - Netskina, O. V.

AU - Komova, O. V.

AU - Prosvirin, I. P.

AU - Pochtar’, A. A.

AU - Ozerova, A. M.

AU - Simagina, V. I.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - Calcined boron–cobalt catalysts, prepared by reduction of cobalt chloride in an aqueous sodium borohydride solution, were applied as components of pelletized solid-state H 2-generating composites based on sodium borohydride. The ferromagnetic catalyst consists of amorphous spherical particles with a mean size of 20 nm, coated with an oxygen-containing shell. A study of the 2 evolution kinetics on adding these formulations into H 2O showed that the heat treatment of the catalyst at 230°С did not affect its performance and the calcination at 500°С and 730°С resulted in a significant decrease in the reaction rate. However, the performance for the catalytic systems studied in hydrolysis of sodium borohydride, calculated per 1 sq cm of the sample surface area, was approximately the same, 0.96 ± 0.12 cu cm of H 2/min. This indicate that the H 2 generation rate in hydrolysis of sodium borohydride correlated with the specific surface area of the catalyst, which is determined by morphological and chemical transformations during calcination.

AB - Calcined boron–cobalt catalysts, prepared by reduction of cobalt chloride in an aqueous sodium borohydride solution, were applied as components of pelletized solid-state H 2-generating composites based on sodium borohydride. The ferromagnetic catalyst consists of amorphous spherical particles with a mean size of 20 nm, coated with an oxygen-containing shell. A study of the 2 evolution kinetics on adding these formulations into H 2O showed that the heat treatment of the catalyst at 230°С did not affect its performance and the calcination at 500°С and 730°С resulted in a significant decrease in the reaction rate. However, the performance for the catalytic systems studied in hydrolysis of sodium borohydride, calculated per 1 sq cm of the sample surface area, was approximately the same, 0.96 ± 0.12 cu cm of H 2/min. This indicate that the H 2 generation rate in hydrolysis of sodium borohydride correlated with the specific surface area of the catalyst, which is determined by morphological and chemical transformations during calcination.

KW - RAY PHOTOELECTRON-SPECTROSCOPY

KW - BALL-MILLING PROCESS

KW - ALKALINE NABH4 SOLUTION

KW - TREATMENT TEMPERATURE

KW - HYDROLYSIS

KW - STORAGE

KW - DECABORANE

KW - PYROLYSIS

KW - STABILITY

KW - BORIDE

UR - http://www.scopus.com/inward/record.url?scp=85042072863&partnerID=8YFLogxK

U2 - 10.1134/S1070427217100160

DO - 10.1134/S1070427217100160

M3 - Article

AN - SCOPUS:85042072863

VL - 90

SP - 1666

EP - 1673

JO - Russian Journal of Applied Chemistry

JF - Russian Journal of Applied Chemistry

SN - 1070-4272

IS - 10

ER -